Physics

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Which of the following is true of double-lobed radio sources? A) Their radio lobes are associated ... Started by EAugust	1 Replies 88 Views	Jul 27, 2018 by upturnedfurball
The amount by which you look into the past when you look at a distant galaxy, a duration equal to ... Started by karlynnae	1 Replies 69 Views	Jul 27, 2018 by triiciiaa
A cluster containing a thousand or more galaxies, usually mostly ellipticals, scattered over a ... Started by madam-professor	1 Replies 70 Views	Jul 27, 2018 by vish98
Which of the following is a drawback of using type Ia supernovae for measuring the distance of ... Started by dalyningkenk	3 Replies 125 Views	Jul 27, 2018 by HandsomeMarc
The Milky Way Galaxy is a part of a galaxy cluster known as _____. A) the Virgo Cluster B) the ... Started by neverstopbelieb	1 Replies 115 Views	Jul 27, 2018 by samiel-sayed
The Local Group is slightly more than _____ in diameter. A) 1 Mpc B) 2 Mpc C) 3 Mpc D) 4 ... Started by penguins	1 Replies 32 Views	Jul 27, 2018 by momtoalll
Which of the following is true of Seyfert galaxies? A) They have inactive nuclei. B) They ... Started by madam-professor	1 Replies 33 Views	Jul 27, 2018 by mmj22343
Identify a true statement about quasars. A) Their spectra are similar to the spectra of stars. ... Started by joblessjake	3 Replies 139 Views	Jul 27, 2018 by tashiedavis420
Which of the following is true of rich galaxy clusters? A) They primarily consist of irregular ... Started by Tazate	1 Replies 90 Views	Jul 27, 2018 by ricroger
A few dozen supermassive black holes have measured masses, and in each case, the mass of the black ... Started by asd123	1 Replies 71 Views	Jul 27, 2018 by Chou
Which of the following is the centerpiece in the unified model of active galactic nuclei (AGN) and ... Started by ts19998	1 Replies 95 Views	Jul 27, 2018 by kingfahad97
Which of the following is true of quasars? A) Quasar eruptions became less common as galaxies ... Started by ENagel	3 Replies 89 Views	Jul 27, 2018 by zhanghao
A__________is a type of active galaxy nucleus that is especially variable and has few or no spectral ... Started by nenivikky	1 Replies 37 Views	Jul 27, 2018 by kardosa007
Briefly discuss the effect of active galaxies on the clusters of galaxies. What will be an ideal ... Started by saraeharris	1 Replies 94 Views	Jul 27, 2018 by leannegxo
What do quasars tell us about the past of the Universe? What will be an ideal ... Started by rmenurse	1 Replies 53 Views	Jul 27, 2018 by nickk12214
Briefly discuss dark matter. What will be an ideal response? ... Started by oliviahorn72	3 Replies 92 Views	Jul 27, 2018 by mcarey591
The observed acceleration of the expansion of the Universe is evidence that some form of energy, ... Started by faduma	1 Replies 145 Views	Jul 27, 2018 by vboyd24
The look-back time to nearby galaxies is only a few million years, but the look-back time to more ... Started by oliviahorn72	1 Replies 124 Views	Jul 27, 2018 by succesfull
The dark age started as the first stars began to form. Indicate whether the statement is true or ... Started by jilianpiloj	1 Replies 72 Views	Jul 27, 2018 by bigcheese9
A big rip is inevitable in the near future. Indicate whether the statement is true or ... Started by Zulu123	3 Replies 107 Views	Jul 27, 2018 by at
Olbers's paradox is based on the assumption that the Universe began at some time in the past. ... Started by nautica902	1 Replies 111 Views	Jul 27, 2018 by aruss1303
Identify a true statement about the cosmic microwave background. A) It is blackbody radiation ... Started by clmills979	1 Replies 65 Views	Jul 27, 2018 by dudman123
If there were lots of baryons present during the early moments of the big bang, they would have: ... Started by PhilipSeeMore	1 Replies 89 Views	Jul 27, 2018 by mochi09
Which of the following is true of a closed Universe? A) It is infinite. B) It has a center. ... Started by michelleunicorn	3 Replies 54 Views	Jul 27, 2018 by nyrave
The _____ is radiation from the hot matter of the Universe soon after the big bang. A) gamma ... Started by newyorker26	1 Replies 79 Views	Jul 27, 2018 by Mollythedog